SDL_fb3dfx.c
资源名称:NETVIDEO.rar [点击查看]
上传用户:sun1608
上传日期:2007-02-02
资源大小:6116k
文件大小:6k
源码类别:
流媒体/Mpeg4/MP4
开发平台:
Visual C++
- /*
- SDL - Simple DirectMedia Layer
- Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga
- This library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public
- License as published by the Free Software Foundation; either
- version 2 of the License, or (at your option) any later version.
- This library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Library General Public License for more details.
- You should have received a copy of the GNU Library General Public
- License along with this library; if not, write to the Free
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- Sam Lantinga
- slouken@libsdl.org
- */
- #ifdef SAVE_RCSID
- static char rcsid =
- "@(#) $Id: SDL_fb3dfx.c,v 1.4 2002/04/22 21:38:04 wmay Exp $";
- #endif
- #include "SDL_types.h"
- #include "SDL_video.h"
- #include "SDL_blit.h"
- #include "SDL_fb3dfx.h"
- #include "3dfx_mmio.h"
- /* Wait for vertical retrace */
- static void WaitVBL(_THIS)
- {
- /* find start of retrace */
- tdfx_waitidle();
- while( (tdfx_in32(TDFX_STATUS) & STATUS_RETRACE) == STATUS_RETRACE )
- ;
- /* wait until we're past the start */
- while( (tdfx_in32(TDFX_STATUS) & STATUS_RETRACE) == 0 )
- ;
- }
- static void WaitIdle(_THIS)
- {
- tdfx_waitidle();
- }
- /* Sets video mem colorkey and accelerated blit function */
- static int SetHWColorKey(_THIS, SDL_Surface *surface, Uint32 key)
- {
- return(0);
- }
- static int FillHWRect(_THIS, SDL_Surface *dst, SDL_Rect *rect, Uint32 color)
- {
- int bpp;
- char *dst_base;
- Uint32 format;
- int dstX, dstY;
- /* Don't blit to the display surface when switched away */
- if ( dst == this->screen ) {
- SDL_mutexP(hw_lock);
- }
- /* Set the destination pixel format */
- dst_base = (char *)((char *)dst->pixels - mapped_mem);
- bpp = dst->format->BitsPerPixel;
- format = dst->pitch | ((bpp+((bpp==8) ? 0 : 8)) << 13);
- /* Calculate source and destination base coordinates */
- dstX = rect->x;
- dstY = rect->y;
- /* Execute the fill command */
- tdfx_wait(6);
- tdfx_out32(DSTBASE, (Uint32)dst_base);
- tdfx_out32(DSTFORMAT, format);
- tdfx_out32(COLORFORE, color);
- tdfx_out32(COMMAND_2D, COMMAND_2D_FILLRECT);
- tdfx_out32(DSTSIZE, rect->w | (rect->h << 16));
- tdfx_out32(LAUNCH_2D, dstX | (dstY << 16));
- FB_AddBusySurface(dst);
- if ( dst == this->screen ) {
- SDL_mutexV(hw_lock);
- }
- return(0);
- }
- static int HWAccelBlit(SDL_Surface *src, SDL_Rect *srcrect,
- SDL_Surface *dst, SDL_Rect *dstrect)
- {
- SDL_VideoDevice *this = current_video;
- int bpp;
- Uint32 src_format;
- Uint32 dst_format;
- char *src_base;
- char *dst_base;
- int srcX, srcY;
- int dstX, dstY;
- Uint32 blitop;
- Uint32 use_colorkey;
- /* Don't blit to the display surface when switched away */
- if ( dst == this->screen ) {
- SDL_mutexP(hw_lock);
- }
- /* Set the source and destination pixel format */
- src_base = (char *)((char *)src->pixels - mapped_mem);
- bpp = src->format->BitsPerPixel;
- src_format = src->pitch | ((bpp+((bpp==8) ? 0 : 8)) << 13);
- dst_base = (char *)((char *)dst->pixels - mapped_mem);
- bpp = dst->format->BitsPerPixel;
- dst_format = dst->pitch | ((bpp+((bpp==8) ? 0 : 8)) << 13);
- srcX = srcrect->x;
- srcY = srcrect->y;
- dstX = dstrect->x;
- dstY = dstrect->y;
- /* Assemble the blit operation */
- blitop = COMMAND_2D_BITBLT | (0xCC << 24);
- if ( srcX <= dstX ) {
- blitop |= BIT(14);
- srcX += (dstrect->w - 1);
- dstX += (dstrect->w - 1);
- }
- if ( srcY <= dstY ) {
- blitop |= BIT(15);
- srcY += (dstrect->h - 1);
- dstY += (dstrect->h - 1);
- }
- /* Perform the blit! */
- if ( (src->flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY ) {
- tdfx_wait(3);
- tdfx_out32(SRCCOLORKEYMIN, src->format->colorkey);
- tdfx_out32(SRCCOLORKEYMAX, src->format->colorkey);
- tdfx_out32(ROP_2D, 0xAA00);
- use_colorkey = 1;
- } else {
- use_colorkey = 0;
- }
- tdfx_wait(9);
- tdfx_out32(SRCBASE, (Uint32)src_base);
- tdfx_out32(SRCFORMAT, src_format);
- tdfx_out32(DSTBASE, (Uint32)dst_base);
- tdfx_out32(DSTFORMAT, src_format);
- tdfx_out32(COMMAND_2D, blitop);
- tdfx_out32(COMMANDEXTRA_2D, use_colorkey);
- tdfx_out32(DSTSIZE, dstrect->w | (dstrect->h << 16));
- tdfx_out32(DSTXY, dstX | (dstY << 16));
- tdfx_out32(LAUNCH_2D, srcX | (srcY << 16));
- FB_AddBusySurface(src);
- FB_AddBusySurface(dst);
- if ( dst == this->screen ) {
- SDL_mutexV(hw_lock);
- }
- return(0);
- }
- static int CheckHWBlit(_THIS, SDL_Surface *src, SDL_Surface *dst)
- {
- int accelerated;
- /* Set initial acceleration on */
- src->flags |= SDL_HWACCEL;
- /* Set the surface attributes */
- if ( (src->flags & SDL_SRCALPHA) == SDL_SRCALPHA ) {
- if ( ! this->info.blit_hw_A ) {
- src->flags &= ~SDL_HWACCEL;
- }
- }
- if ( (src->flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY ) {
- if ( ! this->info.blit_hw_CC ) {
- src->flags &= ~SDL_HWACCEL;
- }
- }
- /* Check to see if final surface blit is accelerated */
- accelerated = !!(src->flags & SDL_HWACCEL);
- if ( accelerated ) {
- src->map->hw_blit = HWAccelBlit;
- }
- return(accelerated);
- }
- void FB_3DfxAccel(_THIS, __u32 card)
- {
- /* We have hardware accelerated surface functions */
- this->CheckHWBlit = CheckHWBlit;
- wait_vbl = WaitVBL;
- wait_idle = WaitIdle;
- /* Reset the 3Dfx controller */
- tdfx_out32(BRESERROR0, 0);
- tdfx_out32(BRESERROR1, 0);
- /* The 3Dfx has an accelerated color fill */
- this->info.blit_fill = 1;
- this->FillHWRect = FillHWRect;
- /* The 3Dfx has accelerated normal and colorkey blits */
- this->info.blit_hw = 1;
- this->info.blit_hw_CC = 1;
- this->SetHWColorKey = SetHWColorKey;
- }